InOnlyProducer.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.camel.component.sjms.producer;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import javax.jms.Message;
import org.apache.camel.AsyncCallback;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.component.sjms.BatchMessage;
import org.apache.camel.component.sjms.MessageProducerResources;
import org.apache.camel.component.sjms.SjmsProducer;
import org.apache.camel.component.sjms.TransactionCommitStrategy;
import org.apache.camel.component.sjms.tx.DefaultTransactionCommitStrategy;

/**
 * A Camel Producer that provides the InOnly Exchange pattern..
 */
public class InOnlyProducer extends SjmsProducer {

    public InOnlyProducer(final Endpoint endpoint) {
        super(endpoint);
    }

    @Override
    protected TransactionCommitStrategy getCommitStrategy() {
        if (isEndpointTransacted()) {
            return super.getCommitStrategy() == null ? new DefaultTransactionCommitStrategy() : super.getCommitStrategy();
        }
        return null;
    }

    @Override
    public void sendMessage(final Exchange exchange, final AsyncCallback callback, final MessageProducerResources producer, final ReleaseProducerCallback releaseProducerCallback) throws Exception {
        try {
            Collection<Message> messages = new ArrayList<Message>(1);
            if (exchange.getIn().getBody() != null) {
                if (exchange.getIn().getBody() instanceof List) {
                    Iterable<?> payload = (Iterable<?>) exchange.getIn().getBody();
                    for (final Object object : payload) {
                        Message message;
                        if (BatchMessage.class.isInstance(object)) {
                            BatchMessage<?> batchMessage = (BatchMessage<?>) object;
                            message = getEndpoint().getBinding().makeJmsMessage(exchange, batchMessage.getPayload(), batchMessage.getHeaders(), producer.getSession(), null);
                        } else {
                            message = getEndpoint().getBinding().makeJmsMessage(exchange, object, exchange.getIn().getHeaders(), producer.getSession(), null);
                        }
                        messages.add(message);
                    }
                } else {
                    Message message = getEndpoint().getBinding().makeJmsMessage(exchange, producer.getSession());
                    messages.add(message);
                }
            } else {
                Message message = getEndpoint().getBinding().makeJmsMessage(exchange, producer.getSession());
                messages.add(message);
            }

            for (final Message message : messages) {
                producer.getMessageProducer().send(message);
            }
        } catch (Exception e) {
            exchange.setException(new Exception("Unable to complete sending the message: ", e));
        } finally {
            releaseProducerCallback.release(producer);
            callback.done(isSynchronous());
        }
    }

}